Weird electrical issue
Thread Starter
|
Posting Guru
Joined: Dec 2012
Posts: 1,242
Likes: 1
From: abilene kansas
Weird electrical issue
Was driving home this evening from picking up a free topper, when I discovered My turn signals,and brake lights were not working. My taillights were working and the turn signal indicators in the dash were flashing normally when I made turns. Now here is where it gets weird. When I shut the headlights off, I had brake lights,and turn signals again. What the heck is the problem? 
Last edited by ctubutis; Jan 7, 2013 at 09:45 PM. Reason: Fix spelling in title
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
You have a ground issue somewhere.
Check the grounds for the rear lamps by removing both taillights. You will see a eyelit connection screwed to the bed. Make sure they are clean and tight.
You may also have to check the lamp sockets.
The front grounds are located on the inner fenders, just above the side marker lamp lens assymbly.
The Brake and turn signal lamps share their ground with the parking lamps.
With a bad or corroded ground, What is happening is your brake and turn signal lamps are finding ground through the parking lamp circut. When you turn on the headlamps, that eliminates the ground and the brake and turn signal lamps no longer function.
Check the grounds for the rear lamps by removing both taillights. You will see a eyelit connection screwed to the bed. Make sure they are clean and tight.
You may also have to check the lamp sockets.
The front grounds are located on the inner fenders, just above the side marker lamp lens assymbly.
The Brake and turn signal lamps share their ground with the parking lamps.
With a bad or corroded ground, What is happening is your brake and turn signal lamps are finding ground through the parking lamp circut. When you turn on the headlamps, that eliminates the ground and the brake and turn signal lamps no longer function.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
You have a ground issue somewhere.
Check the grounds for the rear lamps by removing both taillights. You will see a eyelit connection screwed to the bed. Make sure they are clean and tight.
You may also have to check the lamp sockets.
The front grounds are located on the inner fenders, just above the side marker lamp lens assymbly.
The Brake and turn signal lamps share their ground with the parking lamps.
With a bad or corroded ground, What is happening is your brake and turn signal lamps are finding ground through the parking lamp circut. When you turn on the headlamps, that eliminates the ground and the brake and turn signal lamps no longer function.
Check the grounds for the rear lamps by removing both taillights. You will see a eyelit connection screwed to the bed. Make sure they are clean and tight.
You may also have to check the lamp sockets.
The front grounds are located on the inner fenders, just above the side marker lamp lens assymbly.
The Brake and turn signal lamps share their ground with the parking lamps.
With a bad or corroded ground, What is happening is your brake and turn signal lamps are finding ground through the parking lamp circut. When you turn on the headlamps, that eliminates the ground and the brake and turn signal lamps no longer function.
Thread Starter
|
Posting Guru
Joined: Dec 2012
Posts: 1,242
Likes: 1
From: abilene kansas
You have a ground issue somewhere.
Check the grounds for the rear lamps by removing both taillights. You will see a eyelit connection screwed to the bed. Make sure they are clean and tight.
You may also have to check the lamp sockets.
The front grounds are located on the inner fenders, just above the side marker lamp lens assymbly.
The Brake and turn signal lamps share their ground with the parking lamps.
With a bad or corroded ground, What is happening is your brake and turn signal lamps are finding ground through the parking lamp circut. When you turn on the headlamps, that eliminates the ground and the brake and turn signal lamps no longer function.
Check the grounds for the rear lamps by removing both taillights. You will see a eyelit connection screwed to the bed. Make sure they are clean and tight.
You may also have to check the lamp sockets.
The front grounds are located on the inner fenders, just above the side marker lamp lens assymbly.
The Brake and turn signal lamps share their ground with the parking lamps.
With a bad or corroded ground, What is happening is your brake and turn signal lamps are finding ground through the parking lamp circut. When you turn on the headlamps, that eliminates the ground and the brake and turn signal lamps no longer function.
Thread
Thread Starter
Forum
Replies
Last Post
RICHMC54
1967 - 1972 F-100 & Larger F-Series Trucks
7
Sep 15, 2016 05:06 AM
ranger429
1973 - 1979 F-100 & Larger F-Series Trucks
12
Aug 26, 2003 03:39 PM
